Παραπομπή APA

Zill, D. G. 1., & Cullen, M. R. (1997). Differential equations with boundary-value problems (4th ed.). Pacific Grove: Brooks/Cole Pub. Co..

Παραπομπή Chicago Style

Zill, Dennis G. 1940-, and Michael R. Cullen. Differential Equations With Boundary-value Problems. 4th ed. Pacific Grove: Brooks/Cole Pub. Co., 1997.

Παραπομπή MLA

Zill, Dennis G. 1940-, and Michael R. Cullen. Differential Equations With Boundary-value Problems. 4th ed. Pacific Grove: Brooks/Cole Pub. Co., 1997.

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